This is the traditional white variation of the Pickett N803-ES. What is strange
here is that this rule has the same scales and arrangements as the ES variant in my collection yet this rule is labeled as
a "Dual Base Log Log Standard Range" whereas the ES rule is listed as a "Log Log Speed Rule Dual Base".

This rule has no coloured scales and the enameled finish is similar to the older magnesium based series although
it is in aluminium. This rule also has a new style cursor, yet the model number does not have the N prefix.
I suspect that this may be an early variant of this rule.